Item Type: Router Bit Material: Carbon steel main body + alloy cutter head Shank Diameter: 1/2in Cutter Head Diameter: 1-7/8in Package List 1 x Router Bit 1 x Storage Box Cannot be used for electric drills and drilling machines. 1Standard Size: The finger joint router bit has a standard 1/2in shank and 17/8in cutter head diameter, which is easy to install and use. 2Applicable Boards: Suitable for various wood materials such as medium density fiberboard, hardwood, softwood, particleboard, etc. 3Excellent Materials: Made of excellent carbon steel and alloy materials, with high hardness and wear resistance, and not easy to deform. 4For CNC Machines: Specially designed for milling machines or desktop woodworking engraving machines, this router bit is a good CNC tool. 5Portable Design: The finger joint router bit is small and portable, easy to operate, very suitable for professionals and amateurs.